Investigative documents released this week show Gaudnek denied making the comments and told school officials he has the academic freedom to say what he wants in class. School officials say that doesn’t extend to “using offensive language” to evaluate a student’s work.

School officials sent a letter rebuking his language and reminding him to be respectful toward students or face discipline.

Gaudnek agreed to write a warning on the class syllabus about the language he uses when teaching pop art, Dadaism and Italian Futurism.